2006 ICD-9-CM Volume 1 Diagnosis Codes Home > Injury And Poisoning 800-999 > Complications Of Surgical And Medical Care, Not Elsewhere Classified 996-999 > Complications Affecting Specified Body System Not Elsewhere Classified 997.* > 2006 ICD-9-CM Diagnosis 997.01 Central nervous system complication View the most recent version of ICD-9-CM 997.01 A reduction in brain oxygen supply. Severe hypoxia is referred to as anoxia, and is a relatively common cause of injury to the central nervous system. Prolonged brain anoxia may lead to BRAIN DEATH or a PERSISTENT VEGETATIVE STATE. Histologically, this condition is characterized by neuronal loss which is most prominent in the HIPPOCAMPUS; GLOBUS PALLIDUS; CEREBELLUM; and inferior olives. 997.01 is a specific code that can be used to specify a diagnosis 997.01 contains 4 index entries View the ICD-9-CM Volume 1 997.* hierarchy Alternate Terminology Anoxic brain damage Cerebral hypoxia 997.01 Excludes Cerebrovascular hemorrhage or infarction (997.02)  Index entries containing 997.01: Anoxia 799.02 cerebral 348.1 during or resulting from a procedure 997.01 Damage brain 348.9 anoxic, hypoxic 348.1 during or resulting from a procedure 997.01 Hypoxia (see also Anoxia) 799.02 cerebral 348.1 during or resulting from a procedure 997.01 Pseudomeningocele (cerebral) (infective) 349.2 postprocedural 997.01